Method of securing plane-irons to the stocks of bench-planes



UNITED sTATEs PATENT oEEioE.

'LEONARD BAILEY, OF VINCHESTER, MASSACHUSETTS.

METHOD 0F SECURING PLANE-IRONS TO THE STOCKS 0F BENCH-PLANES.

Specication of Letters Patent No. 21,311, dated August 31, 1858.

To all lwhom 'it may concern? Be it known that I, LEONARD BAILEY, ofWinchester, in the county of Middlesex and State of Massachusetts, haveinvented a new and useful Improvement in Hand-Planes; and I do herebydeclare that the same is fully described and represented in thefollowing specication and the accompanying drawings, of which- Figure 1denotes a top view of a smoothing plane having my invention applied toit; Fig. 2, a. side elevation of it, while Fig. 3 is a central, verticaland longitudinal section of it. Fig. 4L is an underside View of theplane iron and its cap, Fig. 5 being a top view of the same. Fig. 6 is aview of the clamp lever and thumb cam thereof to be hereinafterdescribed.

The object of my invention is to provide the plane with a ready means ofxing the plane iron or cutter in the stock or of removing the sametherefrom as well as of adjusting the plane iron in the stock ascircumstances may require.

In the drawings, A, exhibits the plane stock furnished with a throat, B,for the reception of the cutter or plane-iron, C, or the same and itscap iron, D. In the above mentioned drawings the cap iron, D, is eX-hibited as confined to the plane iron or cutter, C, by means of a screw7L, extending upward from the underside of the cutter C, and through along slot, b, formed in the said cutter as shown in Figs. 3 and 4. Thebearing surface of the throat or that marked CZ, cl, in Fig. 3, isfurnishedwith a recess, c,

for the reception of the head of the screw,

It, by which the cap iron is confined to the plane iron, such recessbeing made of a sufficient size or diameter to allow the necessarylongitudinal movements of the plane iron. Furthermore, the cap-iron asshown in the drawing, is made with a hole, f, arranged midway betweenits two edges and directly over the slot inthe plane iron, such holebeing to enable the plane iron and its cap to be passed over the head ofa bearer or screw F, inserted in the plane stock and made to projectfrom the bearing surface cl, d, as shown in Fig. 3. In connection withthis screw or bearer, F, a clamp lever or plate, G, is employed, itbeing formed as represented in the drawings and hinged or j oint-ed atits upper end to a thumb cam, H. Moreover, the clamp lever, G, has anelongated slot, s, made through it, the said slot in one half its lengthbeing circular inform and having a diameter or width somewhat largerthan the head of the bea-rer or screw, F, while the remainder of theslot is constructed of a width or diameter less than that of the head4of the screw and sufficient to receive the shank of the screw the wholebeing as shown in the drawings. In consequence of the slot being so madewe are enabled to slip or pass the clamp lever, Gr, over the head of thescrew and to press the said clamp lever, G, downward in such manner asto cause the head of the bearer or screw to project beyond the sides ofthe slot, and constitute a fulcrum for the clamp plate when the thumbcam is turned down into the position as shown in Figs. l and 2. Byturning the thumb cam down, we clamp or confine the plane iron in thestock, but by turning such thumb cam upward so as to bring it into theposition as represented in Fig. 7 (which is another longitudinal sectionof the plane) we loosen the clamp lever from the bearer in such manneras to enable us either to remove it therefrom or to adjust the planeiron as circumstances may require. By turning backward the thumb cam, itwill be made to so operate against the plane iron or the cap thereon asto raise the upper end of the clamp lever and force the lower endagainst the bearer in such manner as to cause the lower end of the clampplate to be pressed downward upon the plane iron and secure such ironfirmly upon its bearing surface, cl, CZ. Thus it will be seen that bymeans of the bearer, the clamp lever and the thumb cam the plane ironmay be secured in place in the throat of the plane stock or releasedtherefrom with greatfa.- cility or expedition.

By making the shank of the bearer to screw into the stock we cause thebearer to be adjustable with reference to the seat of the plane iron,and therefore we have a means of readily adapting the bearer to a planeiron of any ordinary thickness, whether provided or not with a cap iron,the adjustment of the bearer being for the purpose of causing the thumbcam and the clamp lever to be brought into the proper situations toenable them by their conjoint action as described to fasten the planeiron to the stock. If desirable, there may be two bearers, F, but Iprefer to have but one, as such is quite sufficient. These bearers maybe arranged near the edges and may project either from or into thestock. A single bearer, however, arranged inthe middle of the entirelength of the edge.

I claim- The application and arrangement of one 0r more bearers, F, theclamp lever, G, and the thumb cam, H, together and With respect to thetop surface of the plane iron and the bearing surface or cutter seat,al, (l, of the throat substantially as represented and described. Y

LEONARD BAILEY.

Witnesses R. H. EDDY, F. P. HALE, Jr.

